I'm looking for a new 454 for my unit. under some circumstances several rebuilders will not warrant a rebuild if installed in a motor home. recon is a big one if you don't buy a mh engine or their fleet truck motor the warranty is not valid. you get no warranty for their light truck and auto engines. if installed in a motor home. Groom engines will not sell you a 454 for a motor home. one of the local rebuilders here will re build my motor if it is a four bolt main and give a warranty. no warranty at all for two bolt main motors installed in a motor home. i think i have a two bolt main motor.
the recon motor is run on a dyno and you get a fact sheet , not sure what that is worth other than you wont have to worry about starting a dry motor. should still have some oil from the dyno run on the bearings.
my motor has 75k on it. it did get run hot two years ago , couldnt be avoided belts came off in an area with no curbs. didnt get extreamley hot. i did start to get a small amount of blow by and that was when i was doing 70mph doesnt appear to blow by if i stay below 65.
last trip i drove from huntsville to sarasota fl and back to valdosta ga no blow by. got in the crazy traffic and strated to drive with the traffic and from the ga /fl line to the ga/al line i used a quart of oil some was in the air filter pan.
time to do something....
2007 chevrolet 2500 duramax 6.6
allison 6 speed
2004 classic 28 WB , Pro Pride P-3 hitch
centramatics wheel ballancers 300-556